Yukio is a human member of Xcution. His Fullbring has been revealed but not named.
The character of Yukio is an antagonist character of the BLEACH series that was created by Tite Kubo, It first began serialization Weekly Shonen Jump in August 2001. He was later introduced during the Lost Shinigami Substitute Arc story arc.
His first appeared in BLEACH Volume 49, CH. 431 "Welcome to our EXECUTION 3", and his first anime appearance was in BLEACH - Episode * "??". His character in the Japanese series is voiced by Mitsuhiro Ichiki, and the U.S. dub produced by VIZ Media has yet to announce a voice actress.